Metallic sandwich sheet

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 15/01 (2006.01) B23K 1/00 (2006.01) B32B 1/04 (2006.01)

Patent

CA 2506994

The invention concerns a sandwich-type metal sheet (2), adapted to a forming and welding operation, and exhibiting excellent resistance at high temperatures, comprising two metal sheet facings (1, 1') having a melting point Tp, and a metallic core (4) having a melting point Ta, Ta capable of being equal to or different from Tp, whereby the core (4) has a density lower than the density of each of the facings (1, 1'), and the core (4) and each of the facings (1, 1') are mutually bound by means of a metallic binding agent (3, 3') having a melting point Tm lower than Ta and Tp. The invention also concerns a method for making said sandwich-type metal sheet (2), and its use in the automotive industry.

L'invention a pour objet une tôle sandwich (2), apte à une opération de formage et de soudage, et présentant une excellente tenue aux températures élevées, comprenant deux parements en tôle métallique (1, 1') présentant un point de fusion Tp, et une âme métallique (4) présentant un point de fusion Ta, Ta pouvant être égal ou différent de Tp, selon laquelle l'âme (4) présente une densité inférieure à la densité de chacun des parements (1, 1'), et l'âme (4) et chacun des parements (1, 1') sont liés entre eux au moyen d'un agent de liaison métallique (3, 3') présentant un point de fusion Tm inférieur à Ta et à Tp. L'invention a également pour objet procédé de fabrication de cette tôle sandwich (2), ainsi que son utilisation dans le domaine automobile.

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